You mean a tool to upgrade from 9.1 to official 9.3 or official 9.4 it's easy just update the Database(Arcadia) with the RDU files that included with my releases and replace
the scripts&newmap & GS with the old one .. then generate your Telecaster data as Insert Query then delete the old Telecaster and restore 9.4 or 9.3 one excute the Query , But if you mean you have a custome items in the ItemResource it's more complecated you need to re create this items to make sure there's no DC problem will happen just for the SQL side you can copy the old lua addons .